Intersection Ray/Plane

[arch_studentin]

Hey,

I am trying to find a python script to help me do the following:

I have a FreeCad line/ray from which i know the starting point and the direction where it points in degrees. Additionally, I have a wall (from an architectural project). So the line represents the viewing direction from a camera, with which I took a photo.

I would like to find a script that prints out the point, where the line meets the wall.
Does someone maybe have any idea on how to do that? Code examples are greatly appreciated, since i am very new to all this.

Thanks a lot!

[mario52]

hi

try Macro_WorkFeatures Points > Point 1/3 > Point=(Line,Face)

or this script (the line should touch the face(s))

Code: Select all

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# example for intersection of shape(Solid) & line(Edge)
# Usage: select a line and a solid, then run this macro
# http://www.forum.freecadweb.org/viewtopic.php?f=22&t=5456

import FreeCAD
import Part

s = FreeCADGui.Selection.getSelection()
if len(s) < 2:
    print( "not enough objects selected - ", len(s))
else:
    try:
        s1 = s[0].Shape
        s2 = s[1].Shape       
      
        cs = s1.common(s2)
        if cs.Vertexes:
            for v in cs.Vertexes:
                point = App.ActiveDocument.addObject("Part::Vertex","Vertex")
                point.Placement=Base.Placement(Base.Vector(v.Point),Base.Rotation(0.0000,0.0000,0.0000,1.0000))
                print( "intersection point : ", v.Point)
    except Exception:
        print( "can't find an intersection point")

mario

[arch_studentin]

hi, thanks for the tips! Unfortunetly, even though i have a line and a plane crossing in one point, the script always says "can't find an intersection point". So that couldnt help.
I searched a lot and couldnt really find a helpful script. So that makes me think is there not an easy way to do that? In my project it should work without finding the points by hands, that is what my professor wants.

Anyone any other ideas? Thanks

[mario52]

hi

give an example file with your objects for testing

mario

[arch_studentin]

FreeCAD0.19SampleFile.FCStd

Sample File

(411.79 KiB) Downloaded 19 times

Ok so here is the sample file.
Basically i made a macro that shows the camera direction and then creates a wall where i can put the image as a texture. (25@001.01.Teil2.FCMacro)
Sorry, i experiment a lot xD
The orange line in the middle passes through the wall, thats where i want to know at which exact point that happens.
Thanks a lot

[mario52]

hi

try this i adding "from FreeCAD import Base"

Code: Select all

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# example for intersection of shape(Solid) & line(Edge)
# Usage: select a line and a solid, then run this macro
# http://www.forum.freecadweb.org/viewtopic.php?f=22&t=5456

import FreeCAD
import Part
from FreeCAD import Base

s = FreeCADGui.Selection.getSelection()
if len(s) < 2:
    print( "not enough objects selected - ", len(s))
else:
    try:
        s1 = s[0].Shape
        s2 = s[1].Shape       
        
        cs = s1.common(s2)
        if cs.Vertexes:
            for v in cs.Vertexes:
                point = App.ActiveDocument.addObject("Part::Vertex","Vertex")
                point.Placement=Base.Placement(Base.Vector(v.Point),Base.Rotation(0.0000,0.0000,0.0000,1.0000))
                print( "intersection point : ", v.Point)
    except Exception:
        print( "can't find an intersection point")

ps:do you want to change the macro name and supp @ (mozilla open the my hotmail)

mario

[arch_studentin]

hi,

mario you are a genius, thank you so much, now it works you dont even know how much i appreciate your help that will help my project a lot! Much love